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2a796654 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
2a796654 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
2a796654 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
2a796654 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <string.h> | |
23 | #include <errno.h> | |
24 | #include <unistd.h> | |
25 | ||
26 | #include "log.h" | |
27 | #include "util.h" | |
49e942b2 | 28 | #include "mkdir.h" |
2a796654 | 29 | #include "unit-name.h" |
5dc4c17f | 30 | #include "virt.h" |
2a796654 | 31 | |
6a39419f | 32 | static const char *arg_dest = "/tmp"; |
2a796654 LP |
33 | |
34 | static int add_symlink(const char *fservice, const char *tservice) { | |
35 | char *from = NULL, *to = NULL; | |
36 | int r; | |
37 | ||
4dc380d1 LP |
38 | assert(fservice); |
39 | assert(tservice); | |
40 | ||
07719a21 | 41 | from = strappend(SYSTEM_DATA_UNIT_PATH "/", fservice); |
b7def684 | 42 | to = strjoin(arg_dest,"/getty.target.wants/", tservice, NULL); |
2a796654 LP |
43 | |
44 | if (!from || !to) { | |
0d0f0c50 | 45 | r = log_oom(); |
2a796654 LP |
46 | goto finish; |
47 | } | |
48 | ||
d2e54fae | 49 | mkdir_parents_label(to, 0755); |
2a796654 | 50 | |
a17b785b LP |
51 | r = symlink(from, to); |
52 | if (r < 0) { | |
53 | if (errno == EEXIST) | |
3c20189a | 54 | /* In case console=hvc0 is passed this will very likely result in EEXIST */ |
a17b785b LP |
55 | r = 0; |
56 | else { | |
57 | log_error("Failed to create symlink from %s to %s: %m", from, to); | |
58 | r = -errno; | |
59 | } | |
2a796654 LP |
60 | } |
61 | ||
62 | finish: | |
63 | ||
64 | free(from); | |
65 | free(to); | |
66 | ||
67 | return r; | |
68 | } | |
69 | ||
4dc380d1 LP |
70 | static int add_serial_getty(const char *tty) { |
71 | char *n; | |
72 | int r; | |
73 | ||
74 | assert(tty); | |
75 | ||
76 | log_debug("Automatically adding serial getty for /dev/%s.", tty); | |
77 | ||
78 | n = unit_name_replace_instance("serial-getty@.service", tty); | |
0d0f0c50 SL |
79 | if (!n) |
80 | return log_oom(); | |
4dc380d1 LP |
81 | |
82 | r = add_symlink("serial-getty@.service", n); | |
83 | free(n); | |
84 | ||
85 | return r; | |
86 | } | |
87 | ||
2a796654 | 88 | int main(int argc, char *argv[]) { |
3c20189a LP |
89 | |
90 | static const char virtualization_consoles[] = | |
91 | "hvc0\0" | |
92 | "xvc0\0" | |
93 | "hvsi0\0"; | |
94 | ||
2a796654 LP |
95 | int r = EXIT_SUCCESS; |
96 | char *active; | |
3c20189a | 97 | const char *j; |
2a796654 | 98 | |
07719a21 LP |
99 | if (argc > 1 && argc != 4) { |
100 | log_error("This program takes three or no arguments."); | |
2a796654 LP |
101 | return EXIT_FAILURE; |
102 | } | |
103 | ||
07719a21 LP |
104 | if (argc > 1) |
105 | arg_dest = argv[1]; | |
106 | ||
a6903061 | 107 | log_set_target(LOG_TARGET_SAFE); |
2a796654 LP |
108 | log_parse_environment(); |
109 | log_open(); | |
110 | ||
4c12626c LP |
111 | umask(0022); |
112 | ||
2a796654 | 113 | if (detect_container(NULL) > 0) { |
6705c2df | 114 | log_debug("Automatically adding console shell."); |
2a796654 | 115 | |
337eebb9 | 116 | if (add_symlink("console-getty.service", "console-getty.service") < 0) |
2a796654 LP |
117 | r = EXIT_FAILURE; |
118 | ||
119 | /* Don't add any further magic if we are in a container */ | |
120 | goto finish; | |
121 | } | |
122 | ||
123 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { | |
124 | const char *tty; | |
125 | ||
a17b785b LP |
126 | tty = strrchr(active, ' '); |
127 | if (tty) | |
2a796654 LP |
128 | tty ++; |
129 | else | |
130 | tty = active; | |
131 | ||
132 | /* Automatically add in a serial getty on the kernel | |
133 | * console */ | |
a705d085 | 134 | if (isempty(tty) || tty_is_vc(tty)) |
3c20189a LP |
135 | free(active); |
136 | else { | |
3c20189a | 137 | int k; |
2a796654 LP |
138 | |
139 | /* We assume that gettys on virtual terminals are | |
140 | * started via manual configuration and do this magic | |
141 | * only for non-VC terminals. */ | |
142 | ||
4dc380d1 | 143 | k = add_serial_getty(tty); |
3c20189a LP |
144 | free(active); |
145 | ||
3c20189a LP |
146 | if (k < 0) { |
147 | r = EXIT_FAILURE; | |
148 | goto finish; | |
149 | } | |
150 | } | |
2a796654 LP |
151 | } |
152 | ||
153 | /* Automatically add in a serial getty on the first | |
154 | * virtualizer console */ | |
3c20189a | 155 | NULSTR_FOREACH(j, virtualization_consoles) { |
4dc380d1 | 156 | char *p; |
3c20189a | 157 | int k; |
2a796654 | 158 | |
3c20189a | 159 | if (asprintf(&p, "/sys/class/tty/%s", j) < 0) { |
0d0f0c50 | 160 | log_oom(); |
2a796654 | 161 | r = EXIT_FAILURE; |
3c20189a LP |
162 | goto finish; |
163 | } | |
980fc73d | 164 | |
3c20189a LP |
165 | k = access(p, F_OK); |
166 | free(p); | |
167 | ||
168 | if (k < 0) | |
169 | continue; | |
980fc73d | 170 | |
4dc380d1 | 171 | k = add_serial_getty(j); |
3c20189a LP |
172 | if (k < 0) { |
173 | r = EXIT_FAILURE; | |
174 | goto finish; | |
175 | } | |
2a796654 LP |
176 | } |
177 | ||
178 | finish: | |
179 | return r; | |
180 | } |